Cheapest return flights from San Francisco to St. Thomas in December from 828€

AirHint found the following cheapest return flights from San Francisco (SFO) to St. Thomas (STT) in December 2025 (see full year).

Return flights

19 Dec - 10 Jan Frontier Airlines
22 Dec - 01 Jan Frontier Airlines
30 Dec - 02 Jan Frontier Airlines
22 Dec - 02 Jan Frontier Airlines
22 Dec - 03 Jan Frontier Airlines
25 Dec - 02 Jan Frontier Airlines

Also check the deals for one-way flights from San Francisco to St. Thomas in December.

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